Frequency Doubler with IC 4011
This frequency doubler uses one CMOS quad, two input NAND gate package type 4011. The frequency doubler proper consists of an inverter IC1B, two differentiating networks R1/C1, R2/C2 and NAND gate IC1A, IC1C and IC1D function as input and output buffers. In Fig.2 exist the pulses in different points of circuit.
Source : Frequency Doubler with IC 4011
Other Link
Frequency doubler operates on triangle waves
Frequency doubler with 4069
Random Number Generator by IC 4017 and 4011
